The lowest price sold unlocked iPhone 4S $ 649 for the 16GB model. If you need more storage, you can choose iPhone 4S unlocked price of $ 749 32GB or 64GB model for $ 849.
With version iPhone 4S or opened you will get a lot of features and services that do not exist in the previous iPhone model.
Compared with the iPhone 4, iPhone 4S noticeably faster. iPhone 4S or version unlocked equivalent iPad 2 in terms of UI speed. Open applications faster, the performance of the browser and other functions of the system increases. Install the application from the App Store, while navigating to other applications also feels lighter.
iPhone 4S or Unlocked version amazing camera. The camera application opens a lot faster and shooting process. Although the iPhone 4 camera is very good in making photographs, but what comes out of the iPhone 4S is much better.
Siri can answer anything you ask. But more than that, if all other voice input system you'll ever know is a system created by the order given, then Siri smarter than that. Apples repeatedly mention that Siri can understand the meaning of your request, context, and many other things. Siri sound system far beyond even the same thing that makes Google's Android.